diff --git a/README.md b/README.md
index 71ca419..1dc3621 100644
--- a/README.md
+++ b/README.md
@@ -220,7 +220,10 @@ void SwapFloat(float *x,float *y)
 ```
 void SwapLong(long *x,long *y)
 {
-
+        long temp;
+        temp = *x;
+        *x = *y;
+        *y = temp;
 }
 ```